(19)

(11)

EP 1 639 203 A1

(12)

(43) Date of publication: 29.03.2006 Bulletin 2006/13 (21) Application number: 04736019.3 (22) Date of filing: 03.06.2004

(51) International Patent Classification (IPC):  E01D 21/00(1968.09) (86) International application number: PCT/PT2004/000011 (87) International publication number: WO 2004/109018 (16.12.2004 Gazette 2004/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 06.06.2003 PT 10296803 (71) Applicant: Pacheco, Pedro Alvares Ribeiro do Carmo Matosinhos, P-4450-181 Porto (PT)	(72) Inventor: Pacheco, Pedro Alvares Ribeiro do Carmo Matosinhos, P-4450-181 Porto (PT) (74) Representative: Duraes Rocha, Manuel et al Cabral Cunha Ferreira & Associados Lda Av. Conselheiro Fernando de Sousa, 11, 15 Edificio Conselheiro 1070-072 Lisboa 1070-072 Lisboa (PT)